% Copyright 2017 Google Inc.
%
% Licensed under the Apache License, Version 2.0 (the "License");
% you may not use this file except in compliance with the License.
% You may obtain a copy of the License at
%
%     https://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.

% Computes the PSNR of two single-channel images

function out_psnr = ComputePSNR(orig_im,est_im)

err = sqrt(mean((orig_im(:)-est_im(:)).^2));
out_psnr = 20*log10(255/err);

return;